Mounjaro and Birth Control: Is It Safe? Label, Studies
Mounjaro can make birth control pills less reliable for a while; add a backup method.
- Verdict
- Fine with care
- Label says
- Listed interaction
Check a GLP-1 interaction
Mounjaro facts at a glance
Its half-life is about 5 days. Half has cleared by 5 d, and roughly 3% remains after five half-lives (25 d).
In SURPASS-1, people with type 2 diabetes lost 7.8 kg over 40 weeks, compared with 1 kg on placebo.
Monthly costs in US dollars include list price and self-pay offers. Each price comes from the maker's price page.
Sources: FDA label (DailyMed), healthsystemtracker.org, pricinginfo.lilly.com.
Mounjaro and birth control: the verdict
Fine with care
Word for word, from the drug interactions section of the Mounjaro label:
“Advise patients using oral hormonal contraceptives to switch to a non-oral contraceptive method or add a barrier method of contraception for 4 weeks after initiation”
This comes from the FDA label (DailyMed).
What the Mounjaro label says
Birth control pills are the subject of these Mounjaro label statements.
| Named in the label | The risk | What the label tells doctors |
|---|---|---|
| Oral medicines | Pills absorbed differently | This medicine slows how quickly your stomach empties, which may change how other pills are absorbed. |
| Birth control pills | Birth control pills may work less well | For a while, this drug may make birth control pills less effective. Once you start it and every time the dose goes up, add a barrier method to your pills or use a non-oral method. |
This comes from the Mounjaro label (DailyMed).
What the studies show
- birth control pills label interaction
This comes from the FDA label (DailyMed).
The practical rule
After starting, and following every dose increase, use a non-pill method or add condoms for 4 weeks.
This comes from the FDA label (DailyMed).
Birth control with other GLP-1s
Each label's drug interaction section was reviewed for this same concern.
| Medicine | Birth control pills in the label | Verdict | Page |
|---|---|---|---|
 Ozempic | Not named; general pill caution | Generally fine together | Read the answer |
 Wegovy | Not named; general pill caution | Generally fine together | Read the answer |
 Rybelsus | Not named; general pill caution | Not listed | Not listed |
| Mounjaro | Named in the label | Fine with care | Not listed |
 Zepbound | Named in the label | Fine with care | Read the answer |
 Foundayo | Named in the label | Not listed | Not listed |
 Trulicity | Not named; general pill caution | Not listed | Not listed |
 Saxenda | Not named; general pill caution | Not listed | Not listed |
 Victoza | Not named; general pill caution | Not listed | Not listed |
| Byetta | Named in the label | Not listed | Not listed |
This comes from the FDA label (DailyMed).